import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * Created by sheep on 2015/12/27.
 */
public class MutexEvenGenerator extends IntGenerator {

    private int currentEvenValue = 0;
    private Lock lock = new ReentrantLock();
    public int next(){
        lock.lock();
        try{
            ++currentEvenValue;
            Thread.yield();
            ++currentEvenValue;
            return currentEvenValue;
        }finally{
            lock.unlock();
        }

    }

    public static void main(String[] args) {
        EvenChecker.test(new MutexEvenGenerator());
    }

}
